Renovation Work Time

The first company would renovate the complex in 30 hours. Another company would fix it in 20 hours. But the first company left after 5 hours of joint work. How long will it take to renovate the site?

Final Answer:

t =  16.6667 h

Step-by-step explanation:

305+20t=1  5/30+t/20=1  3t=50  t=350=16.66666667  t=35016.666667=16.6667 h



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